Hanna Instruments PCA 311 User manual

1
Instruction Manual
PCA 311, PCA 321, PCA 331
Bromine, pH, Temperature, ORP
Analyzers
www.hannainst.com

2
Dear Customer,
Thank you for choosing a Hanna Product.
This instruction manual has been written for the following:
PCA 331 – Bromine, pH, temperature, ORP analyzer.
PCA 321 – Bromine, pH, temperature analyzer.
PCA 311 – Bromine analyzer.
The analyzers have features such as: automatic bromine measurement, pH, temperature
and ORP measurement, bromine and pH dosing regulator, selectable sampling
periods, alarm system, data link through GSM network, user friendly interface,
serial communication through RS485, recorder output, 4-20mA dosing output,
Nema 4X enclosure.
The ordering code for bromine analyzers is:
PCA 3a1-b
a = 1 - Bromine analyzer
2 - Bromine, pH and Temperature analyzer
3 - Bromine, pH, Temperature and ORP analyzer
b = 1 - 115V AC 50-60Hz
2 - 220V AC 50-60Hz
Please read this instruction manual carefully before using the instrument. It will provide
you the necessary information for the correct use of the instrument, as well as a
more precise idea of its versatility.
Hanna Instruments reserves the right to modify the design, construction and appearance
of its products without advance notice.

3
TABLE OF CONTENTS
PRELIMINARY EXAMINATION........................................6
GENERAL DESCRIPTION..............................................7
MECHANICAL DIMENSIONS........................................9
FUNCTIONAL DESCRIPTION........................................10
DISPLAY, LEDS AND KEYBOARD...................................11
SPECIFICATIONS.......................................................14
OPERATING DESCRIPTION.........................................16
Bromine measurement ......................................16
Method of analysis ........................................17
pH and temperature measurement ...................17
ORP measurement ........................................17
INITIAL PREPARATION AND INSTALLATION...................18
Installation Personnel......................................18
Location of the Instrument...............................18
Hydraulic Connections....................................18
Installing the Input Filter...................................19
Installing the pH and ORP probes .....................20
Installing the Pump Tubes.................................21
Electrical Connections.....................................22
STARTUP.....................................................................26
USER INTERFACE .......................................................27
Panels organization ........................................ 27
Main panels ............................................... 27
Measure panels ............................................. 28
Messages .................................................... 29
Menu mode ................................................ 29
Password procedure ..................................... 29
Navigating through menu .............................. 30
Modify a parameter ........................................ 30
PROGRAMMING THE ANALYZER .............................. 32
GENERAL SETTINGS ...............................................33

4
Changing the password ................................. 33
Setting the language ..................................... 33
Analyzer serial number and software version ...... 33
Time and date ............................................. 33
WORKING MODE ................................................... 34
Automatic mode .......................................... 34
Standby mode ............................................. 34
Manual mode ............................................. 34
Read on demand ........................................... 35
Direct read ................................................. 35
System error relay..............................................35
BROMINE SETTINGS ............................................... 36
Reagent changing .......................................... 36
Measure settings .......................................... 37
Measure info ................................................ 37
Analog output ............................................. 37
Bromine dosing ........................................... 38
Alarms ........................................................ 39
CALIBRATE THE MEASURING CELL ............................. 40
Calibration date and factor ............................ 40
Calibration procedure ..................................... 40
pH SETTINGS (PCA 321, PCA 331) ............................. 41
Measure info............................................... 41
Analog output ............................................. 42
pH dosing .................................................. 42
Alarms ....................................................... 44
pH CALIBRATION (PCA 321, PCA 331) ....................... 44
One point calibration ................................... 45
Two-points calibration ..................................... 46
Process pH calibration .................................... 46
Set default calibration ..................................... 47
TEMPERATURE SETTINGS (PCA 321, PCA 331) ............ 48
Units ......................................................... 48
Measure info .............................................. 48

5
Analog output............................................. 48
Alarms ....................................................... 49
ORP SETTINGS (PCA 331) ..........................................50
Measure info .............................................. 50
Analog output ............................................ 50
Alarms ....................................................... 51
ANALOG OUTPUT .................................................. 52
Select the analog output type .......................... 52
Dosing through 4-20 mA output ...................... 52
CALIBRATE THE ANALOG OUTPUT .............................53
Output middle range ........................................54
SYSTEM LOG ..........................................................55
Set log ....................................................... 55
Clear system log .......................................... 55
View log ..................................................... 55
SERIAL COMMUNICATION ........................................ 57
Standard mode ............................................ 57
GSM ..................................................................... 58
GSM mode ................................................ 58
Setting the GSM feature ................................. 58
GSM connection .......................................... 59
Setting SMS feature ......................................... 60
Modem connection.......................................... 64
MAINTENANCE ...................................................... 65
Electrode conditioning and maintenance ........... 66
Changing peristaltic pump tubing .................... 68
Tubing replacement.......................................... 69
Cleaning measurement cell .............................. 69
Cell Cleaning Procedure ................................ 70
ERRORS, ALARMS AND WARNINGS ............................ 71
ACCESORIES ........................................................... 74

6
PRELIMINARY EXAMINATION
Remove the analyzer from the packing material and examine
it carefully to make sure that no damage has occurred during
shipping. If there is any noticeable damage, notify your dealer
immediately.
Each analyzer is supplied complete with:
• 2 reagent bottles (1 indicator and 1 buffer solution)
• 2 reagent bottle caps
• 1 DPD compound powder
• tubing
Note: Save all packing materials until you are sure that the
instrument functions correctly. Any damaged or defective items
must be returned in their original packing materials together
with the supplied accessories.
WARNING: The PCA 311 - PCA 331 series of Bromine, pH and ORP
Analyzers are not designed for use with samples that are
inflammable or explosive in nature. If any sample solution
other than water is used with these products, test the sample/
product compatibility to assure user safety and proper product
performance.
Safety Precautions: Please take the time to read the safety precautions
carefully wherever they appear in this manual. They are
provided to prevent personal injury and damage to the
instrument. This safety information applies to the operators
and service personnel and the following two captions are
used:
CAUTION: identifies conditions or practices that could result in
damage to the instrument or persons;
Warning:identifies conditions or practices that could result in personal
injury or loss of life.
Note: Because of the inherent dangers in handling chemical
samples, standards and reagents, HANNA Instruments
strongly recommends the users of this product to review the
Material Safety Data Sheets and become familiar with safe
handling procedures and proper usage prior to handling
any chemicals.

7
GENERAL DESCRIPTION
The Hanna PCA 311, PCA 321 and PCA 331 series of
bromine, pH, ORP and temperature analyzers are micro-
processor controlled, process analyzers which continuously
monitor a sample stream for bromine content, pH, ORP
and temperature values.
The PCA 311-331 monitor the bromine in the 0.0 to 10.0 mg/L
range depending on the factory settings and used reagents.
In the DPD Colorimetric method, N, N-Diethyl-p-phenylene-
diamine indicator and a buffer are mixed with the sample.
The resulting chemical reaction causes a magenta color to
form. The color intensity is proportional to the concentration
of bromine. The color intensity is measured photometrically
(with a light beam and a photodetector) and converted to
bromine concentration, in mg/L, which is displayed on the
front panel.
Indicator and buffer reagent bottles are placed directly into
the instrument case. With a sampling period of 5 minutes,
reagents need to be replenished about once a month. The
reagent bottles are easily visible through the transparent
window allowing the operator to check the reagent levels.
PCA 321 and PCA 331 analyzers use a HI 1005 probe to
continuously measure the pH of the sample stream in the range
of 0 to 14 pH. The sample temperature is measured in the 5 to
75°C range. pH and temperature are displayed on the front
panel. pH value is corrected with temperature.
PCA 331 analyzer use HI 2008 platinum ORP electrode to
continuously measure the sample ORP value.
The pH/temperature combined sensor and the ORP sensor
are placed inside the case, directly in the sample stream.
The case of PCA 311-331 analyzers meet NEMA 4X, 12 and

8
13 standards. Molded fiberglass polyester has outstanding
chemical and temperature resistance.
The case provides wall mounting capability and door gasket
assures a watertight and dust-tight seal.
The electrical and hydraulic connections are made through
the side of the enclosure.
The front cover is secured with two lockable latches.
Four bromine level setpoints can be adjusted by the operator:
a proportional dosing setpoint, two alarm setpoints and a
minimum level for dosing.
The proportional dosing factor (1/delta) is user selectable with
a delta between 0.2 and 10.0 mg/L (ppm). Bromine dosing
system controls a SPST relay.
Each bromine alarm can be enabled or disabled.
Three pH level setpoints can be adjusted by the operator: a
dosing setpoint and two alarm setpoints. The pH control mode
is user selectable: on/off or proportional dosing.
The proportional dosing factor (1/delta) is user selectable with
a delta between 0.1 and 2 pH . The on/off dosing hysteresis is
user selectable between 0.05 and 2.00 pH. pH dosing system
controls a SPST relay.
Each pH alarm can be enabled or disabled.
For temperature and ORP, two alarm levels can be set by the
user.
Each temperature or ORP alarm can be enabled or disabled.
Alarm condition controls a SPDT relay.
A system error feature provides relay activation to signals need
for operator intervention.
System error condition controls a SPST relay.
Voltage output ranges of 0-10mV, 0-100mV, 0-1V or a
current output of 4-20 or 0-20 mA are available to drive an
external device such as a chart recorder.
The analyzer can drive a proportional dosing pump through
the 4-20 mA output, for bromine or for acid/alkali dosing.
The analog output is fully programmable and could be
proportional with bromine concentration, pH, ORP or
temperature value. The limits of the analog output is
selectable for each parameter.

9
The analyzer can store up to 3500 readings (at least 7 days at
3 minutes sampling interval), that are available for consulting
or downloading.
The PCA 311-331 analyzers can be monitored or controlled
through RS485 or GSM network connection.
Errors, alarms and warnings are sent through SMS (using GSM
module HI 504900).
The analyzer state can be interrogated by a simple call using
GSM phone.
Time is displayed on the main panel and a time related
warning system for “Old calibration” “Reagent expired” and
“SIM expired” is available.
The language for user interface can be easily changed without
restarting the analyzer.
MECHANICAL DIMENSIONS
Case dimensions in mm & inches
254
304.8
338.3
389.1
374.8
254
393.7
367.1
209.8
83.1
13.32"
10"
12"
15.32"
3.27"
8.26"
14.76"
15.5"
10"
14.45"
FRONT VIEW
FRONT VIEW
SIDE VIEW
SIDE VIEW
REAR VIEW
REAR VIEW

10
FUNCTIONAL DESCRIPTION
1. Alarms, dosing, system error LED’s
2. Character Display
3. Cable glands
4. Keypad
5. Peristaltic Pump
6. Access Point to Cell
7. Measuring Cell
8. Drain Tube
9. Output Port
10. Drain Port Valve
11. Drain Port of Measuring Cell
12. Sample Tubing
13. Buffer Bottle
14. Pressure Regulator Output Port
15. Incoming Pressure Regulator
16. Indicator Bottle
17. Sample Inlet Port
18. pH Electrode (not included)
19. Electrodes Holder
20. Sample Output Port
21. Electrovalve
22. ORP Electrode (not included)
23. Reagent Tubing
24. Line Input

11
DISPLAY, LEDS AND KEYBOARD
DISPLAY
The display contains 4 lines with 20 characters on one line.
The information and error messages are clearly displayed in
plain language, without error codes.
The display has backlight for better visibility.
The analyzer is in main panels mode when displays a panel
that contains the measured values. Several main panels could
be selected by pressing the up and down arrow keys. The PCA
311 do not have the main mode for the display.
1 - measured values
2 - controller status
3 - current time and date
4 - message line
The display is in bromine, pH, ORP or temperature measuring
panels mode when displays one of those values and secondary
information related to it. Several panels with different secondary
information could be selected by pressing the up or down
arrow keys.
When the display is in one of the above modes, the measuring
units, the current time and the alarm or error status are also
displayed. PCA 311 is always in bromine measuring panels.

12
1 - measured value (bromine, pH, ORP or temperature)
2 - measurement units (mg/L, pH, mV, °C or °F)
3 - current time in format HH:MM
4 - warnings, alarms and errors, displayed one at a time
5 - secondary information.
LEDs
Three or four LEDs are present on the front panel:
ALARM LED (red), signals the presence of at least one alarm
and the closing of the Alarm relay. When the alarm is
present, the LED blinks. When the analyzer is in
MANUAL mode, the LED is on but not blinking.
DOSING BROMINE LED (green), signals the closing of the
bromine dosing relay. When dosing stops, the LED is
turned off.
DOSING ACID/ALK. LED (green), signals the closing of the
acid/alkali dosing relay. When dosing stops, the LED
is turned off (PCA 321 and PCA 331 only).
SYSTEM ERROR LED (red), signals the presence of an error
and the closing of the System error relay. When the
error is present, the LED blinks. When in STANDBY
mode, the led is on but not blinking.
For PCA 311 the system error LED is moved in the dosing
ACID/ALK. LED position.
KEYPAD
The keypad has 8 keys with the following signification:
UP and DOWN ARROWS
• select the main display appearance,
• select the menu,
• select an item from a list,
• edit values.
16:35
1.3 mg/L Alarm
<Br Calibration Old>
Min:0.0 Max:5.6
3
12
4
5

13
LEFT and RIGHT ARROWS
• select an error message,
• select an item to edit or
• select the current digit for editing.
MENU enter in menu mode.
CFM confirm the selected menu and edited values.
SET starts editing the selected item.
ESC
• return to the previous menu,
• exit from operation without saving.
SET
ESC
CFM
MENU

14
SPECIFICATIONS
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16
OPERATING DESCRIPTION
BROMINE MEASUREMENT
Referring to the drawing on page 10 and the Fluidic Diagram
on page 17, the Sample Line is connected to the instrument at
the Sample Port (#17); an internal Regulator (#15) reduces
the inlet pressure from a maximum of 4 bar (57.2 psi) down to
1 bar (14.3 psi); from the Regulator a nylon tube is connected
to the input of the Electrovalve (#21). The output of the valve
goes to the Drain Port (#11) and then to the Measuring Cell
(#7). An optional Filter can be installed to the sample port if
the stream is excessively turbid.
The sample coming from the line normally flows through the
Measuring Cell (#7). It goes out from the Measuring Cell
through the Drain Tube (#8) and the Output Port (#9).
The Measuring Cell is accessible from the port placed on the
top (#6) for speedy cleaning and maintenance.
During the 100 seconds preceding the sampling, the analyzer
solenoid input valve is open to allow sample flow to flush the
colorimeter cell. Every 3 to 90 minutes (user selectable), the
electrovalve closes stopping the sample flow and leaving the
sample cell full of fresh sample. Cell volume is controlled by
an overflow gateway.
As the sample inlet electrovalve closes, a series of measurements
(with LED on and off) of the unreacted sample is taken to determine
an average blank level prior to reagent addition.
The measurement of sample blank signal permits compensation
for any turbidity or natural color, and provides the zero reference
point for the measurement.
The two channel Peristaltic Pump (#5) starts rotating causing
a precise quantity of buffer and indicator (#13 and #16) to
enter the colorimeter sample cell. Here a magnetically coupled
stirrer mixes the reagents with the sample.
After a delay for the color development, a series of measurements
(with LED on and off) are taken (sample level) to determine an
average bromine concentration measurement. The reacted
sample signal is then measured and displayed.
This sequence is repeated every 3 to 90 minutes (user-selectable).

17
METHOD OF ANALYSIS
The available
bromine
oxidizes the
bromine
reagents at a
pH between
5.5 and 6.0 to
form a magenta-
colored com-
pound. The
intensity of the
resulting color
is propor-
tional to the
concentration
of bromine in
the sample.
pH AND TEMPERATURE MEASUREMENT
The HI 1005 pH/temperature probe provides at the out port
a potential proportional with the pH. The temperature is
measured with PT100 platinum sensor.
For increased accuracy the pH is corrected with temperature
and with the calibration coefficients. Up to 2 buffers can be
used for calibration.
The temperature can be displayed in °C or °F.
The probe can withstand pressure up to 6 bar (87 psi).
ORP MEASUREMENT
The HI 2008 probe provides at the out port a potential
proportional with the ORP value. The value is directly
displayed in mV.
The probe can withstand pressure up to 6 bar (87 psi).

18
INITIAL PREPARATION AND INSTALLATION
INSTALLATION PERSONNEL
Installation of the PCA 311-331 Bromine, pH, ORP and
temperature analyzers should be undertaken by persons with
technical knowledge of the dangers associated with chemical
exposure and electrical shock.
Hanna Instruments assumes that persons performing the installation
tasks are aware of the appropriate safety procedures.
CAUTION: Review the Material Safety Data Sheets (MSDS) before
handling the supplied chemical reagents.
LOCATION OF THE INSTRUMENT
Analyzer Location
Locate the analyzer as close as is reasonably possible to the
point where the sample is withdrawn from the product stream
(referred to as the sampling point).
The instrument should be mounted indoors, out of direct sun-
light. Instrument operating temperature is 5 to 40°C (41 to
104°F).
Sampling Point Location
Locate the sampling point to obtain a truly representative sample
from the product stream. For example, be sure the sampling
point is well downstream from a Bromine and acid / alkali
feed. This assures that adequate mixing and reaction of the
Bromine and acid / alkali before a sample is extracted.
HYDRAULIC CONNECTIONS
Note: Hydraulic connections should be installed only by qualified
personnel to assure conformity to applicable plumbing codes.
Sample Line Installation
Direct routing of sample lines is recommended.
If the large process pipes are horizontal, taps should be
inserted vertically in the middle of the pipe to avoid pulling
sediment from the bottom or air bubbles from the top of the
pipe into the sample line.
A 1/2 BSP sample input fitting allows direct connection to the
optional input filter.

19
Sample line pressure should be between 0.07 and 4 bar
(1 and 57.2 psi) with an ideal pressure of 0.7 bar (10 psi).
Drain Line Installation
The drain hose fitting is a 20 mm (3/4”) hose barb on the
bottom of the instrument enclosure. An air gap between the
end of the drain hose and the drain is recommended to
prevent any back flow into the instrument in the event of drain
blockage.
Return Line Installation
The return hose fitting is a 12 mm (1/2”) hose barb on the
bottom of the regulator output port and should always be
connected even when pressure is below 1 bar.

20
INSTALLING THE INPUT FILTER
In order to ensure maximum accuracy of measurements, it is
recommended to have always clear sample, with suspended
particles smaller than 0.5 μm. This can be achieved by install-
ing two filters before the sample input.
The type of filters de-
pends on the quality
of the water: the first
filter should have 50-
100 μm pore size,
whereas in any case
the second filter, the
one closer to the ana-
lyzer, has to be 0.5 μm.
For correct installing procedure and maintenance, see the
instructions of filters.
INSTALLING THE pH AND ORP PROBES
To mount the pH and ORP probes, first turn off the analyzer.
Unscrew the closing caps from the electrode holder and remove
the protective cap from electrodes and electrodes connectors.
Screw the pH probe (HI 1005) in the lower position and the ORP probe
(HI 2008) in the higher position and assure that no leakage occurs.
ORP probe
PH probe
PCA 301
REAGENTS
PCA 301
REAGENTS
HI 70498A-0
BROMINE INDICATOR SOLUTION
HI 70498A-0
BROMINE INDICATOR SOLUTION
R: - -
S: - -
R: - -
S: - -
ETICPCA30A
ETICPCA30A
Contents:
p-ToluenesulfonicAcid (6192-52-5)
Water (7732-18-5)
Contents:
p-ToluenesulfonicAcid (6192-52-5)
Water (7732-18-5)
FOR LABORATORYAND INDUSTRIAL USE ONLY
DO NOT FREEZE
STORE ATROOM TEMPERATURE
KEEP CONTAINERTIGHTLY CLOSED
FOR LABORATORYAND INDUSTRIAL USE ONLY
DO NOT FREEZE
STORE AT ROOM TEMPERATURE
KEEP CONTAINERTIGHTLY CLOSED
PCA 301
REAGENTS
PCA 301
REAGENTS
HI 70498B-0
BROMINE BUFFER SOLUTION
HI 70498B-0
BROMINE BUFFER SOLUTION
Xn: Harmful
R: 22
S: 46
Xn: Harmful
R: 22
S: 46
ETICPCA30B
FOR LABORATORYAND INDUSTRIAL USE ONLY
DO NOT FREEZE
STORE ATROOM TEMPERATURE
KEEP CONTAINERTIGHTLY CLOSED
HARMFUL IF SWALLOWED.
IF SWALLOWEDSEEK MEDICAL ADVICE IMMEDIATELY
AND SHOW THIS CONTAINEROR LABEL.
FOR LABORATORYAND INDUSTRIAL USE ONLY
DO NOT FREEZE
STORE AT ROOM TEMPERATURE
KEEP CONTAINERTIGHTLY CLOSED
HARMFUL IF SWALLOWED.
IF SWALLOWEDSEEK MEDICAL ADVICE IMMEDIATELY
AND SHOW THIS CONTAINEROR LABEL.
Contents:
Lithium Bimaleate (unknown)
Lithium Maleate (unknown)
Water (7732-18-5)
Contents:
Lithium Bimaleate (unknown)
Lithium Maleate (unknown)
Water (7732-18-5)
BROMINE
PCA-331
Bromine/pH/ORP
Analyzer
Bromine/pH/ORP
Analyzer